Transcript
STEVE INSKEEP, HOST:
It's MORNING EDITION from NPR News. I'm Steve Inskeep.
DAVID GREENE, HOST:
And I'm David Greene. Good morning.
The lead agency in yesterday's Boston Marathon explosions is the FBI. Federal investigators say this morning they are doing all they can to get answers, but there is still much they do not know.
INSKEEP: Here's some of what we do know. Three people were killed, and the number of injured is now topped 150. That's according to Massachusetts governor Deval Patrick.